The Giver - Jonas receives the memories of the past, good and bad, from the current Receiver, a wise old man who tells Jonas to call him the Giver. The Giver transmits memories by placing his hands on Jonas's bare back. The first memory he receives is of an exhilarating sled ride.
Gathering Blue is the 2nd book in the Giver quartet. It follows a girl named Kira. Kira is a girl with a twisted leg who lives in a more primitive society where people who cannot work die. Her only friend is a boy named Matt, a one syllable boy.
Messenger - Matty lives in the same Village where Jonas (from Lowry's The Giver, though he is simply called Leader in this book) arrived some 6 years earlier on his red sled; little Gabe has grown to be eight years old, and Jonas is very their young but upright and inspiring leader.
Son is the sequel to The Giver by Lois Lowry. It was preceded by Messenger, the third book of the series. The book follows Claire, the mother of Gabriel, the baby seen in The Giver.